On-axis single-target sputter deposition of YBCO on Si and YSZ

Hung, C.‐Y.; Scyoc, J. M. Van; Schlesingera, T.E.; Johnson, Jo; Brewer, J. A.; Migliuolo, M.

doi:10.1016/0921-5107(94)01179-6

Cited by 7 publications

(1 citation statement)

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“…Epitaxial YBCO films with excellent quality were obtained using pulsed laser deposition (PLD) on insulating substrates such as Strontium Titanate (SrTiO 3 ), Lanthanum Aluminate (LaAlO 3 ) 19 and their doped films 20 , 21 . Several works have demonstrated PLD growth of YBCO thin films on insulators such as Zirconia and MgO as buffer layers on semiconducting materials such as Si 22 and GaN 23 . However, due to the extremely short coherence lengths in these high-T c superconductors and the large potential barrier presented by the insulating buffer, proximity of a superconductor wavefunction to the semiconductor is virtually impossible through the buffer layers.…”

Section: Introductionmentioning

confidence: 99%

Nanoscale High-Tc YBCO/GaN Super-Schottky Diode

Panna

Balasubramanian

Bouscher

et al. 2018

Sci Rep

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We demonstrate a high-temperature nanoscale super-Schottky diode based on a superconducting tunnel junction of pulsed-laser-deposited YBCO on GaN thin films. A buffer-free direct growth of nanoscale YBCO thin films on heavily doped GaN was performed to realize a direct high-Tc superconductor-semiconductor junction. The junction shows strongly non-linear I-V characteristics, which have practical applications as a low-voltage super-Schottky diode for microwave mixing and detection. The V-shaped differential conductance spectra observed across the junction are characteristic of the c-axis tunneling into a cuprate superconductor with a certain disorder level. This implementation of the super-Schottky diode, supported by the buffer-free direct growth of nanoscale high-Tc thin films on semiconductors, paves the way for practical large-scale fabrication and integration of high-Tc-superconductor devices in future technologies.

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Section: Introductionmentioning

confidence: 99%